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Old 01-26-2013, 02:17 PM
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You can make you own go no go gauges from sheet metal or welding rod to compare port width height dimensions by hand. Or use calipers. Just make then visually as close the same as practical.
Its the size of the "choke" that counts. (point of minimum cross sectional area)
Air flow gets real funky at supersonic speeds. Running Engines do not flow air like a flow bench.
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